- Gabar Goshawk
- Gadwall
- Garganey
- Germain's Swiftlet
- Giant Cowbird
- Glaucous Gull
- Glittering-throated Emerald
- Glossy Ibis
- Goldcrest
- Golden-bellied Gerygone
- Golden-bellied Starfrontlet
- Golden-breasted Puffleg
- Golden-cheeked Warbler
- Golden-crowned Tanager
- Golden-faced Tyrannulet
- Golden-fronted Whitestart
- Golden-headed Manakin
- Golden-headed Quetzal
- Golden-hooded Tanager
- Golden-olive Woodpecker
- Golden-winged Sparrow
- Golden-winged Warbler
- Golden Tanager
- Goliath Heron
- Graceful Prinia
- Grasshopper Sparrow
- Great-tailed Grackle
- Great Antshrike
- Great Black-backed Gull
- Great Black Hawk
- Great Blue Heron
- Great Cormorant
- Great Crested Grebe
- Great Curassow
- Great Egret
- Great Grey Shrike
- Great Hornbill
- Great Iora
- Great Kiskadee
- Great Knot
- Great Myna
- Great Sapphirewing
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Thrush
- Great Tit
- Great White Pelican
- Greater Blue-eared Starling
- Greater Coucal
- Greater Crested Tern
- Greater Flamingo
- Greater Green Leafbird
- Greater Honeyguide
- Greater Hoopoe-Lark
- Greater Necklaced Laughingthrush
- Greater Racket-tailed Drongo
- Greater Roadrunner
- Greater Sand Plover
- Greater Scaup
- Greater Short-toed Lark
- Greater Yellowlegs
- Green-and-black Fruiteater
- Green-backed Trogon
- Green-billed Malkoha
- Green-legged Partridge
- Green-rumped Parrotlet
- Green-tailed Jacamar
- Green-winged Teal
- Green Hermit
- Green Heron
- Green Honeycreeper
- Green Ibis
- Green Kingfisher
- Green Peafowl
- Green Sandpiper
- Green Twinspot
- Grey-backed Fiscal
- Grey-breasted Mountain Toucan
- Grey-browed Brushfinch
- Grey-cheeked Thrush
- Grey-cowled Wood Rail
- Grey-headed Canary-flycatcher
- Grey-headed Chachalaca
- Grey-headed Chickadee
- Grey-headed Lapwing
- Grey-headed Swamphen
- Grey-headed Woodpecker
- Grey-lined Hawk
- Grey-tailed Mountaingem
- Grey-tailed Tattler
- Grey Catbird
- Grey Francolin
- Grey Hawk
- Grey Heron
- Grey Hypocolius
- Grey Kingbird
- Grey Plover
- Grey Seedeater
- Grey Wagtail
- Greylag Goose
- Griffon Vulture
- Groove-billed Ani
- Guianan Cock-of-the-rock
- Gull-billed Tern